Home
Gemstones


Alexandrite and Pezzotaite Optical Properties


Pezzotaite and Alexandrite Optical Properties


Optical Properties

Luster
Vitreous   
Not Available   

Pleochroism
Not Available   
Not Available   

Dispersion
Not Available   
Not Available   

Transparency
Transparent, Transparent to nearly opaque   
Not Available   

Refractive Index
1.739-1.770   
1.60-1.61   

Optic Character
Biaxial/+   
Not Available   

Crystal System
Orthorhombic   
Trigonal   

Birefringence
0.007-0.010   
Not Available   

Clarity
Transparent   
Color grading system   

Benefits >>
<< Physical Properties

Alexandrite and Pezzotaite Optic Character

Alexandrite and Pezzotaite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Alexandrite and Pezzotaite Physical Properties like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Alexandrite and Pezzotaite optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character. Alexandrite has Biaxial/+ character.

Compare Gems for Scorpio

Alexandrite and Pezzotaite Transparency

Similar to their colors, Alexandrite and Pezzotaite transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Alexandrite is Transparent and Transparent to nearly opaque while Alexandrite is Transparent and Transparent to nearly opaque in appearance.

Gems for Scorpio

Gems for Scorpio


Compare Gems for Scorpio